
\begingroup
\centering
\begin{tabular}{m{6cm} m{1.4cm} m{1.4cm} m{1.4cm} m{1.4cm} m{1.4cm} m{1.4cm}}
   \toprule
                                   & (1)            & (2)           & (3)           & (4)            & (5)           & (6)\\  
   $\textbf{Panel A: ammonia}$\\
                                   &                &               &               &                &               &  \\  
   IHS restored wetland (acres)    & -0.019$^{***}$ & -0.018$^{**}$ & -0.009$^{**}$ & -0.013$^{***}$ & -0.010$^{**}$ & -0.007$^{**}$\\   
                                   & (0.005)        & (0.008)       & (0.004)       & (0.003)        & (0.005)       & (0.003)\\   
   Upstream ammonia (w=streamflow) & 0.181$^{***}$  & 0.202$^{***}$ & 0.209$^{***}$ & 0.207$^{***}$  & 0.221$^{***}$ & 0.226$^{***}$\\   
                                   & (0.055)        & (0.070)       & (0.051)       & (0.046)        & (0.060)       & (0.046)\\   
    \\
   Dependent variable mean         & 0.14605        & 0.14605       & 0.14605       & 0.13120        & 0.13120       & 0.13120\\  
   Observations                    & 1,774          & 1,774         & 1,774         & 1,774          & 1,774         & 1,774\\  
   Adjusted R$^2$                  & 0.39580        & 0.41607       & 0.53750       & 0.42771        & 0.44713       & 0.53100\\  
                                   &                &               &               &                &               &  \\  
\end{tabular}
\par\endgroup


